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2. Oppenheimer pole - Wikipedia

   en.wikipedia.org/wiki/Oppenheimer_pole

   When it became clear that wooden poles on the northern part of the line were going to be rapidly destroyed by termites, it was decided to construct the line with 3,000 metal poles. Wooden poles are also vulnerable to fire and much of the line's route suffers frequent bushfires. Many poles were later replaced with Oppenheimer poles for this ...

3. Jack post - Wikipedia

   en.wikipedia.org/wiki/Jack_post

   Jack posts are telescopic tubular steel props consisting of two primary parts, the main part of the post, and the jack screw or other adjustable fitting on one or both ends. Both ends are normally fitted with flat metal plates on the end, providing additional support area.

4. Digging bar - Wikipedia

   en.wikipedia.org/wiki/Digging_bar

   Using digging bars to move rocks A girl and a man dig a hole with a heavy digging bar to plant a tree. Common uses of digging bars include breaking up clay, concrete, frozen ground, and other hard materials, moving or breaking up tree roots and obstacles, and making holes in the ground for fence posts.

5. Stobie pole - Wikipedia

   en.wikipedia.org/wiki/Stobie_pole

   Each year SA Power Networks manufactures around 4,500 Stobie poles at a plant in Angle Park, South Australia. [5] The poles carry supply voltages from 240 to 275,000 volts and come in various sizes from 9–26 m (30–85 ft) in length, though studies indicate heights to 36 m (118 ft) are feasible. [6]

6. Got Trees With Dead or Damaged Limbs? There’s a Pole Saw for ...

   www.aol.com/8-best-pole-saws-every-175400659.html

   525P4S Gas Pole Saw. Husqvarna makes some of the best chainsaws around, and that includes pole saws. With a 25cc gas engine powering a foot-long cutting bar, this pole saw is capable of taking ...

7. Tree height measurement - Wikipedia

   en.wikipedia.org/wiki/Tree_height_measurement

   A pole is generally used to measure the remaining height of the tree. The climber pulls up an extendable pole and uses it to reach to the top of the tree from the point at the upper end of the tape. If not vertical, the slope of the leaning pole is measured and the length of the pole is measured.